info:eu-repo/semantics/article
ASPECTOS GEOTECTÔNICOS DA ÁFRICA OCIDENTAL A LESTE DO GOLFO DA GUINÉ COM REFERÊNCIA ÀS CONEXÕES ESTRUTURAIS E LITOLÓGICAS ENTRE BRASIL E ÁFRICA
ASPECTOS GEOTECTÔNICOS DA ÁFRICA OCIDENTAL A LESTE DO GOLFO DA GUINÉ COM REFERÊNCIA ÀS CONEXÕES ESTRUTURAIS E LITOLÓGICAS ENTRE BRASIL E ÁFRICA
Autor
LOCZY, LOUlS DE
Institución
Resumen
Based on the results of recent investigations in Western Africa, the author analyzes the geotectonic composition of Nigeria, Camerroon and Gabon, taking into consideration the structural, líthologíc and geochronologica1 relationshíps with those of the Brazilian margin in Pernambuco and Sergipe. Advantage was taken of a reconnaissance journey made in January 1978, when the author vísited the region of the "Volcaníc Mountain" of the Republíc of the Cameroon, the southern part of the "Ngaourandere Fault Zone" and the Cretaceous basins of Douala and the Niger delta. Of particular ínterest were the transcurrent alignments which fulfill an important role in the tectonic makeup of the two continents. By way of comparison, the author also examined the geological framework of the Northeast and Northwest of Brazil and extended the general observations to the Brazilian Central-West as well as to the Guiana Shíeld. This work proposes to contribute to the clarification of some of the problems of the initial continental break-up and the separation of South America and Africa. Presented in this publicatíon ís a summary of the conclusions discussed in greater detail by the author in a prevíous work titled "Problemas Geotectônicos dos Alinhamentos Arqueozóicos do Cameroon, Pernambuco e Guaporé, com referência à mineralização de urânio". Based on the results of recent investigations in Western Africa, the author analyzes the geotectonic composition of Nigeria, Camerroon and Gabon, taking into consideration the structural, líthologíc and geochronologica1 relationshíps with those of the Brazilian margin in Pernambuco and Sergipe. Advantage was taken of a reconnaissance journey made in January 1978, when the author vísited the region of the "Volcaníc Mountain" of the Republíc of the Cameroon, the southern part of the "Ngaourandere Fault Zone" and the Cretaceous basins of Douala and the Niger delta. Of particular ínterest were the transcurrent alignments which fulfill an important role in the tectonic makeup of the two continents. By way of comparison, the author also examined the geological framework of the Northeast and Northwest of Brazil and extended the general observations to the Brazilian Central-West as well as to the Guiana Shíeld. This work proposes to contribute to the clarification of some of the problems of the initial continental break-up and the separation of South America and Africa. Presented in this publicatíon ís a summary of the conclusions discussed in greater detail by the author in a prevíous work titled "Problemas Geotectônicos dos Alinhamentos Arqueozóicos do Cameroon, Pernambuco e Guaporé, com referência à mineralização de urânio".